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Review of the commissioning of Sector 45

28 February 2008
CERN
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  1. 0. Identification of main issues appearing during the commissioning Sector 45
    Roberto Saban (CERN)
    28/02/2008, 08:30
    - Event driven by view from operation - invitation to an open discussion - Scenarios: commissioning to 450 GeV, 2 TeV and 4 .. 6 TeV - Key dates in preparation for the next sector and outlook to planning - Discussions on improvements: what can be done in the next 3-4 weeks? - 2 shifts during 5 days versus 3 shifts during 7 days, , MPP analysis, what can be done in a nightshift – WE?...
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  2. 1. Powering Test Overview
    Boris Bellesia (Politecnico di Torino)
    28/02/2008, 09:00
    - What happens before powering tests after cooldown - Main issues that slowed us down - ELQA: Continue as for sector 45? Further optimisation of the strategy? - What has been done during the powering tests? During what time? By whom? Efficiency? - How to ensure minimization of re-commissioning 45 and to secure what has been achieved? - How to avoid that changes during the “shutdown”...
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  3. 2. Safety and access I
    Anne Funken (CERN)
    28/02/2008, 09:30
    - Electrical safety during interventions, “consignation” - Electrical safety subsectors
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  4. 3. Safety and access II
    Magali Gruwe (CERN)
    28/02/2008, 10:00
    - Hardware commissioning using the access system - Set the rules for access, different modes
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  5. 4. Safety and access III
    Mr Hugues Thiesen, Dr Karl Hubert Mess (CERN AT-MEL)
    28/02/2008, 10:30
    - Tunnel access during powering – what can access during powering as a function of current in the different circuits? Clear and transparent rules.
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  6. 5. Cryo Performance & Operation
    Mr Serge CLAUDET (CERN AT ACR)
    28/02/2008, 11:10
    - Availability for cryogenic system - Recovery time after quenches: what can we expect? - Operation overnight and over the weekend: is it possible? - Operation with several sectors in parallel, what will change? - Presence in the CCC - Level measurements - How to ensure a correct Helium level for operation?
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  7. 6. Cryogenic conditions for powering tests
    Dr Andrzej SIEMKO (CERN AT-MTM)
    28/02/2008, 11:40
    - What can be done at what temperature? (e.g. below 2.8 K low current tests), and when can we start the tests? - Relaxed operation at reduced current (e.g. can we operate without cold compressors a magnet currents corresponding to 2 TeV)? - Table for all steps and all circuits? - Orbit correctors 60 / 120 A – what conditions? What needs to be watched by operators? - Procedure: masking of...
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  8. 7. Power Converters
    David Nisbet (CERN), Yves Thurel (CERN)
    28/02/2008, 12:10
    - 600 A spikes during 0 V crossing and QPS system - Spikes and how to avoid them (IERROR and IEARTH) - RB power converter performance, is there an issue?
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  9. 8. Quench Protection and Energy Extraction System
    Knud Dahlerup-Petersen (CERN), Reiner Denz (CERN AT-MEL-PM)
    28/02/2008, 14:00
    - Partial heater firing if switches do not open – yes/no? - Access to the tunnel for 600 A extraction switches, can be optimised? - Firing heaters without current in the magnet circuit – Why? EMC due to other tests? - Closing switches for many circuits
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  10. 9. Time for commissioning versus objectives
    Antonio Vergara Fernandez (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMA)
    28/02/2008, 14:30
    - 450 GeV, 2 TeV and 5 .. 6 TeV: what circuits at what current? What can be left for later? (remember: it is always possible to bring in other circuits on the fly) - How much time is required to commission for injection, for ~2 TeV, 4-6 TeV and 7 TeV? What could be gained? What circuits could be left out? - When is tunnel access required? By whom? How to optimise it? What can be done...
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  11. 10. Procedures
    Dr Nuria Catalan Lasheras (CERN), Walter Venturini Delsolaro (CERN)
    28/02/2008, 15:00
    - Procedures and their realisation in sequences: can they be lighter? - EDMS approval of procedures and their changes - Analysis and approval of test steps in CCC – can it be improved?
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  12. 11. What quenches did we observe? What is expected?
    Arjan Verweij (CERN), Robert Henry Flora (Fermi National Accelerator Lab. (Fermilab))
    28/02/2008, 15:30
    - What circuits? - What quenches? - Why did it quench?
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  13. 12. Tools provided by CO
    Dr Markus Zerlauth (CERN)
    28/02/2008, 16:10
    - Status of PM system? Data gets sometimes stuck? - PM event builder - Can we become more efficient with more automatic analysis? - Coherence MTF – LSA etc. - Long tests: can one reduce the time of the test online, for example due to a long plateau? PASS TO THE NEXT STEP button. - Managing powering: better SOC names to avoid confusion? SOCs per day? - Tools for powering groups of...
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  14. 13. Tools for coordination
    Alvaro Marqueta Barbero (Cent. Invest. Energ. Medioamb. Tec. (CIEMAT) - Consejo Sup. de I)
    28/02/2008, 16:40
    - How to improve the Powering Test Visualisation tool, etc. - How to improve the planning tool (EXCEL?) Can both be merged?
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  15. 14. Feed Back
    Alick Macpherson, LHC HWC Operators
    28/02/2008, 17:10
  16. 15. Summary and Discussions
    Mr Rüdiger Schmidt (CERN)
    28/02/2008, 17:40